1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (c) 2000-2001,2005 Silicon Graphics, Inc. 4 * All Rights Reserved. 5 */ 6 #include "xfs.h" 7 #include "xfs_shared.h" 8 #include "xfs_format.h" 9 #include "xfs_fs.h" 10 #include "xfs_log_format.h" 11 #include "xfs_trans_resv.h" 12 #include "xfs_mount.h" 13 #include "xfs_errortag.h" 14 #include "xfs_error.h" 15 #include "xfs_sysfs.h" 16 #include "xfs_inode.h" 17 18 #ifdef DEBUG 19 20 static unsigned int xfs_errortag_random_default[] = { 21 XFS_RANDOM_DEFAULT, 22 XFS_RANDOM_IFLUSH_1, 23 XFS_RANDOM_IFLUSH_2, 24 XFS_RANDOM_IFLUSH_3, 25 XFS_RANDOM_IFLUSH_4, 26 XFS_RANDOM_IFLUSH_5, 27 XFS_RANDOM_IFLUSH_6, 28 XFS_RANDOM_DA_READ_BUF, 29 XFS_RANDOM_BTREE_CHECK_LBLOCK, 30 XFS_RANDOM_BTREE_CHECK_SBLOCK, 31 XFS_RANDOM_ALLOC_READ_AGF, 32 XFS_RANDOM_IALLOC_READ_AGI, 33 XFS_RANDOM_ITOBP_INOTOBP, 34 XFS_RANDOM_IUNLINK, 35 XFS_RANDOM_IUNLINK_REMOVE, 36 XFS_RANDOM_DIR_INO_VALIDATE, 37 XFS_RANDOM_BULKSTAT_READ_CHUNK, 38 XFS_RANDOM_IODONE_IOERR, 39 XFS_RANDOM_STRATREAD_IOERR, 40 XFS_RANDOM_STRATCMPL_IOERR, 41 XFS_RANDOM_DIOWRITE_IOERR, 42 XFS_RANDOM_BMAPIFORMAT, 43 XFS_RANDOM_FREE_EXTENT, 44 XFS_RANDOM_RMAP_FINISH_ONE, 45 XFS_RANDOM_REFCOUNT_CONTINUE_UPDATE, 46 XFS_RANDOM_REFCOUNT_FINISH_ONE, 47 XFS_RANDOM_BMAP_FINISH_ONE, 48 XFS_RANDOM_AG_RESV_CRITICAL, 49 XFS_RANDOM_DROP_WRITES, 50 XFS_RANDOM_LOG_BAD_CRC, 51 XFS_RANDOM_LOG_ITEM_PIN, 52 XFS_RANDOM_BUF_LRU_REF, 53 XFS_RANDOM_FORCE_SCRUB_REPAIR, 54 XFS_RANDOM_FORCE_SUMMARY_RECALC, 55 XFS_RANDOM_IUNLINK_FALLBACK, 56 XFS_RANDOM_BUF_IOERROR, 57 XFS_RANDOM_REDUCE_MAX_IEXTENTS, 58 XFS_RANDOM_BMAP_ALLOC_MINLEN_EXTENT, 59 XFS_RANDOM_AG_RESV_FAIL, 60 }; 61 62 struct xfs_errortag_attr { 63 struct attribute attr; 64 unsigned int tag; 65 }; 66 67 static inline struct xfs_errortag_attr * 68 to_attr(struct attribute *attr) 69 { 70 return container_of(attr, struct xfs_errortag_attr, attr); 71 } 72 73 static inline struct xfs_mount * 74 to_mp(struct kobject *kobject) 75 { 76 struct xfs_kobj *kobj = to_kobj(kobject); 77 78 return container_of(kobj, struct xfs_mount, m_errortag_kobj); 79 } 80 81 STATIC ssize_t 82 xfs_errortag_attr_store( 83 struct kobject *kobject, 84 struct attribute *attr, 85 const char *buf, 86 size_t count) 87 { 88 struct xfs_mount *mp = to_mp(kobject); 89 struct xfs_errortag_attr *xfs_attr = to_attr(attr); 90 int ret; 91 unsigned int val; 92 93 if (strcmp(buf, "default") == 0) { 94 val = xfs_errortag_random_default[xfs_attr->tag]; 95 } else { 96 ret = kstrtouint(buf, 0, &val); 97 if (ret) 98 return ret; 99 } 100 101 ret = xfs_errortag_set(mp, xfs_attr->tag, val); 102 if (ret) 103 return ret; 104 return count; 105 } 106 107 STATIC ssize_t 108 xfs_errortag_attr_show( 109 struct kobject *kobject, 110 struct attribute *attr, 111 char *buf) 112 { 113 struct xfs_mount *mp = to_mp(kobject); 114 struct xfs_errortag_attr *xfs_attr = to_attr(attr); 115 116 return snprintf(buf, PAGE_SIZE, "%u\n", 117 xfs_errortag_get(mp, xfs_attr->tag)); 118 } 119 120 static const struct sysfs_ops xfs_errortag_sysfs_ops = { 121 .show = xfs_errortag_attr_show, 122 .store = xfs_errortag_attr_store, 123 }; 124 125 #define XFS_ERRORTAG_ATTR_RW(_name, _tag) \ 126 static struct xfs_errortag_attr xfs_errortag_attr_##_name = { \ 127 .attr = {.name = __stringify(_name), \ 128 .mode = VERIFY_OCTAL_PERMISSIONS(S_IWUSR | S_IRUGO) }, \ 129 .tag = (_tag), \ 130 } 131 132 #define XFS_ERRORTAG_ATTR_LIST(_name) &xfs_errortag_attr_##_name.attr 133 134 XFS_ERRORTAG_ATTR_RW(noerror, XFS_ERRTAG_NOERROR); 135 XFS_ERRORTAG_ATTR_RW(iflush1, XFS_ERRTAG_IFLUSH_1); 136 XFS_ERRORTAG_ATTR_RW(iflush2, XFS_ERRTAG_IFLUSH_2); 137 XFS_ERRORTAG_ATTR_RW(iflush3, XFS_ERRTAG_IFLUSH_3); 138 XFS_ERRORTAG_ATTR_RW(iflush4, XFS_ERRTAG_IFLUSH_4); 139 XFS_ERRORTAG_ATTR_RW(iflush5, XFS_ERRTAG_IFLUSH_5); 140 XFS_ERRORTAG_ATTR_RW(iflush6, XFS_ERRTAG_IFLUSH_6); 141 XFS_ERRORTAG_ATTR_RW(dareadbuf, XFS_ERRTAG_DA_READ_BUF); 142 XFS_ERRORTAG_ATTR_RW(btree_chk_lblk, XFS_ERRTAG_BTREE_CHECK_LBLOCK); 143 XFS_ERRORTAG_ATTR_RW(btree_chk_sblk, XFS_ERRTAG_BTREE_CHECK_SBLOCK); 144 XFS_ERRORTAG_ATTR_RW(readagf, XFS_ERRTAG_ALLOC_READ_AGF); 145 XFS_ERRORTAG_ATTR_RW(readagi, XFS_ERRTAG_IALLOC_READ_AGI); 146 XFS_ERRORTAG_ATTR_RW(itobp, XFS_ERRTAG_ITOBP_INOTOBP); 147 XFS_ERRORTAG_ATTR_RW(iunlink, XFS_ERRTAG_IUNLINK); 148 XFS_ERRORTAG_ATTR_RW(iunlinkrm, XFS_ERRTAG_IUNLINK_REMOVE); 149 XFS_ERRORTAG_ATTR_RW(dirinovalid, XFS_ERRTAG_DIR_INO_VALIDATE); 150 XFS_ERRORTAG_ATTR_RW(bulkstat, XFS_ERRTAG_BULKSTAT_READ_CHUNK); 151 XFS_ERRORTAG_ATTR_RW(logiodone, XFS_ERRTAG_IODONE_IOERR); 152 XFS_ERRORTAG_ATTR_RW(stratread, XFS_ERRTAG_STRATREAD_IOERR); 153 XFS_ERRORTAG_ATTR_RW(stratcmpl, XFS_ERRTAG_STRATCMPL_IOERR); 154 XFS_ERRORTAG_ATTR_RW(diowrite, XFS_ERRTAG_DIOWRITE_IOERR); 155 XFS_ERRORTAG_ATTR_RW(bmapifmt, XFS_ERRTAG_BMAPIFORMAT); 156 XFS_ERRORTAG_ATTR_RW(free_extent, XFS_ERRTAG_FREE_EXTENT); 157 XFS_ERRORTAG_ATTR_RW(rmap_finish_one, XFS_ERRTAG_RMAP_FINISH_ONE); 158 XFS_ERRORTAG_ATTR_RW(refcount_continue_update, XFS_ERRTAG_REFCOUNT_CONTINUE_UPDATE); 159 XFS_ERRORTAG_ATTR_RW(refcount_finish_one, XFS_ERRTAG_REFCOUNT_FINISH_ONE); 160 XFS_ERRORTAG_ATTR_RW(bmap_finish_one, XFS_ERRTAG_BMAP_FINISH_ONE); 161 XFS_ERRORTAG_ATTR_RW(ag_resv_critical, XFS_ERRTAG_AG_RESV_CRITICAL); 162 XFS_ERRORTAG_ATTR_RW(drop_writes, XFS_ERRTAG_DROP_WRITES); 163 XFS_ERRORTAG_ATTR_RW(log_bad_crc, XFS_ERRTAG_LOG_BAD_CRC); 164 XFS_ERRORTAG_ATTR_RW(log_item_pin, XFS_ERRTAG_LOG_ITEM_PIN); 165 XFS_ERRORTAG_ATTR_RW(buf_lru_ref, XFS_ERRTAG_BUF_LRU_REF); 166 XFS_ERRORTAG_ATTR_RW(force_repair, XFS_ERRTAG_FORCE_SCRUB_REPAIR); 167 XFS_ERRORTAG_ATTR_RW(bad_summary, XFS_ERRTAG_FORCE_SUMMARY_RECALC); 168 XFS_ERRORTAG_ATTR_RW(iunlink_fallback, XFS_ERRTAG_IUNLINK_FALLBACK); 169 XFS_ERRORTAG_ATTR_RW(buf_ioerror, XFS_ERRTAG_BUF_IOERROR); 170 XFS_ERRORTAG_ATTR_RW(reduce_max_iextents, XFS_ERRTAG_REDUCE_MAX_IEXTENTS); 171 XFS_ERRORTAG_ATTR_RW(bmap_alloc_minlen_extent, XFS_ERRTAG_BMAP_ALLOC_MINLEN_EXTENT); 172 XFS_ERRORTAG_ATTR_RW(ag_resv_fail, XFS_ERRTAG_AG_RESV_FAIL); 173 174 static struct attribute *xfs_errortag_attrs[] = { 175 XFS_ERRORTAG_ATTR_LIST(noerror), 176 XFS_ERRORTAG_ATTR_LIST(iflush1), 177 XFS_ERRORTAG_ATTR_LIST(iflush2), 178 XFS_ERRORTAG_ATTR_LIST(iflush3), 179 XFS_ERRORTAG_ATTR_LIST(iflush4), 180 XFS_ERRORTAG_ATTR_LIST(iflush5), 181 XFS_ERRORTAG_ATTR_LIST(iflush6), 182 XFS_ERRORTAG_ATTR_LIST(dareadbuf), 183 XFS_ERRORTAG_ATTR_LIST(btree_chk_lblk), 184 XFS_ERRORTAG_ATTR_LIST(btree_chk_sblk), 185 XFS_ERRORTAG_ATTR_LIST(readagf), 186 XFS_ERRORTAG_ATTR_LIST(readagi), 187 XFS_ERRORTAG_ATTR_LIST(itobp), 188 XFS_ERRORTAG_ATTR_LIST(iunlink), 189 XFS_ERRORTAG_ATTR_LIST(iunlinkrm), 190 XFS_ERRORTAG_ATTR_LIST(dirinovalid), 191 XFS_ERRORTAG_ATTR_LIST(bulkstat), 192 XFS_ERRORTAG_ATTR_LIST(logiodone), 193 XFS_ERRORTAG_ATTR_LIST(stratread), 194 XFS_ERRORTAG_ATTR_LIST(stratcmpl), 195 XFS_ERRORTAG_ATTR_LIST(diowrite), 196 XFS_ERRORTAG_ATTR_LIST(bmapifmt), 197 XFS_ERRORTAG_ATTR_LIST(free_extent), 198 XFS_ERRORTAG_ATTR_LIST(rmap_finish_one), 199 XFS_ERRORTAG_ATTR_LIST(refcount_continue_update), 200 XFS_ERRORTAG_ATTR_LIST(refcount_finish_one), 201 XFS_ERRORTAG_ATTR_LIST(bmap_finish_one), 202 XFS_ERRORTAG_ATTR_LIST(ag_resv_critical), 203 XFS_ERRORTAG_ATTR_LIST(drop_writes), 204 XFS_ERRORTAG_ATTR_LIST(log_bad_crc), 205 XFS_ERRORTAG_ATTR_LIST(log_item_pin), 206 XFS_ERRORTAG_ATTR_LIST(buf_lru_ref), 207 XFS_ERRORTAG_ATTR_LIST(force_repair), 208 XFS_ERRORTAG_ATTR_LIST(bad_summary), 209 XFS_ERRORTAG_ATTR_LIST(iunlink_fallback), 210 XFS_ERRORTAG_ATTR_LIST(buf_ioerror), 211 XFS_ERRORTAG_ATTR_LIST(reduce_max_iextents), 212 XFS_ERRORTAG_ATTR_LIST(bmap_alloc_minlen_extent), 213 XFS_ERRORTAG_ATTR_LIST(ag_resv_fail), 214 NULL, 215 }; 216 217 static struct kobj_type xfs_errortag_ktype = { 218 .release = xfs_sysfs_release, 219 .sysfs_ops = &xfs_errortag_sysfs_ops, 220 .default_attrs = xfs_errortag_attrs, 221 }; 222 223 int 224 xfs_errortag_init( 225 struct xfs_mount *mp) 226 { 227 mp->m_errortag = kmem_zalloc(sizeof(unsigned int) * XFS_ERRTAG_MAX, 228 KM_MAYFAIL); 229 if (!mp->m_errortag) 230 return -ENOMEM; 231 232 return xfs_sysfs_init(&mp->m_errortag_kobj, &xfs_errortag_ktype, 233 &mp->m_kobj, "errortag"); 234 } 235 236 void 237 xfs_errortag_del( 238 struct xfs_mount *mp) 239 { 240 xfs_sysfs_del(&mp->m_errortag_kobj); 241 kmem_free(mp->m_errortag); 242 } 243 244 bool 245 xfs_errortag_test( 246 struct xfs_mount *mp, 247 const char *expression, 248 const char *file, 249 int line, 250 unsigned int error_tag) 251 { 252 unsigned int randfactor; 253 254 /* 255 * To be able to use error injection anywhere, we need to ensure error 256 * injection mechanism is already initialized. 257 * 258 * Code paths like I/O completion can be called before the 259 * initialization is complete, but be able to inject errors in such 260 * places is still useful. 261 */ 262 if (!mp->m_errortag) 263 return false; 264 265 ASSERT(error_tag < XFS_ERRTAG_MAX); 266 randfactor = mp->m_errortag[error_tag]; 267 if (!randfactor || prandom_u32() % randfactor) 268 return false; 269 270 xfs_warn_ratelimited(mp, 271 "Injecting error (%s) at file %s, line %d, on filesystem \"%s\"", 272 expression, file, line, mp->m_super->s_id); 273 return true; 274 } 275 276 int 277 xfs_errortag_get( 278 struct xfs_mount *mp, 279 unsigned int error_tag) 280 { 281 if (error_tag >= XFS_ERRTAG_MAX) 282 return -EINVAL; 283 284 return mp->m_errortag[error_tag]; 285 } 286 287 int 288 xfs_errortag_set( 289 struct xfs_mount *mp, 290 unsigned int error_tag, 291 unsigned int tag_value) 292 { 293 if (error_tag >= XFS_ERRTAG_MAX) 294 return -EINVAL; 295 296 mp->m_errortag[error_tag] = tag_value; 297 return 0; 298 } 299 300 int 301 xfs_errortag_add( 302 struct xfs_mount *mp, 303 unsigned int error_tag) 304 { 305 BUILD_BUG_ON(ARRAY_SIZE(xfs_errortag_random_default) != XFS_ERRTAG_MAX); 306 307 if (error_tag >= XFS_ERRTAG_MAX) 308 return -EINVAL; 309 310 return xfs_errortag_set(mp, error_tag, 311 xfs_errortag_random_default[error_tag]); 312 } 313 314 int 315 xfs_errortag_clearall( 316 struct xfs_mount *mp) 317 { 318 memset(mp->m_errortag, 0, sizeof(unsigned int) * XFS_ERRTAG_MAX); 319 return 0; 320 } 321 #endif /* DEBUG */ 322 323 void 324 xfs_error_report( 325 const char *tag, 326 int level, 327 struct xfs_mount *mp, 328 const char *filename, 329 int linenum, 330 xfs_failaddr_t failaddr) 331 { 332 if (level <= xfs_error_level) { 333 xfs_alert_tag(mp, XFS_PTAG_ERROR_REPORT, 334 "Internal error %s at line %d of file %s. Caller %pS", 335 tag, linenum, filename, failaddr); 336 337 xfs_stack_trace(); 338 } 339 } 340 341 void 342 xfs_corruption_error( 343 const char *tag, 344 int level, 345 struct xfs_mount *mp, 346 const void *buf, 347 size_t bufsize, 348 const char *filename, 349 int linenum, 350 xfs_failaddr_t failaddr) 351 { 352 if (buf && level <= xfs_error_level) 353 xfs_hex_dump(buf, bufsize); 354 xfs_error_report(tag, level, mp, filename, linenum, failaddr); 355 xfs_alert(mp, "Corruption detected. Unmount and run xfs_repair"); 356 } 357 358 /* 359 * Complain about the kinds of metadata corruption that we can't detect from a 360 * verifier, such as incorrect inter-block relationship data. Does not set 361 * bp->b_error. 362 * 363 * Call xfs_buf_mark_corrupt, not this function. 364 */ 365 void 366 xfs_buf_corruption_error( 367 struct xfs_buf *bp, 368 xfs_failaddr_t fa) 369 { 370 struct xfs_mount *mp = bp->b_mount; 371 372 xfs_alert_tag(mp, XFS_PTAG_VERIFIER_ERROR, 373 "Metadata corruption detected at %pS, %s block 0x%llx", 374 fa, bp->b_ops->name, bp->b_bn); 375 376 xfs_alert(mp, "Unmount and run xfs_repair"); 377 378 if (xfs_error_level >= XFS_ERRLEVEL_HIGH) 379 xfs_stack_trace(); 380 } 381 382 /* 383 * Warnings specifically for verifier errors. Differentiate CRC vs. invalid 384 * values, and omit the stack trace unless the error level is tuned high. 385 */ 386 void 387 xfs_buf_verifier_error( 388 struct xfs_buf *bp, 389 int error, 390 const char *name, 391 const void *buf, 392 size_t bufsz, 393 xfs_failaddr_t failaddr) 394 { 395 struct xfs_mount *mp = bp->b_mount; 396 xfs_failaddr_t fa; 397 int sz; 398 399 fa = failaddr ? failaddr : __return_address; 400 __xfs_buf_ioerror(bp, error, fa); 401 402 xfs_alert_tag(mp, XFS_PTAG_VERIFIER_ERROR, 403 "Metadata %s detected at %pS, %s block 0x%llx %s", 404 bp->b_error == -EFSBADCRC ? "CRC error" : "corruption", 405 fa, bp->b_ops->name, bp->b_bn, name); 406 407 xfs_alert(mp, "Unmount and run xfs_repair"); 408 409 if (xfs_error_level >= XFS_ERRLEVEL_LOW) { 410 sz = min_t(size_t, XFS_CORRUPTION_DUMP_LEN, bufsz); 411 xfs_alert(mp, "First %d bytes of corrupted metadata buffer:", 412 sz); 413 xfs_hex_dump(buf, sz); 414 } 415 416 if (xfs_error_level >= XFS_ERRLEVEL_HIGH) 417 xfs_stack_trace(); 418 } 419 420 /* 421 * Warnings specifically for verifier errors. Differentiate CRC vs. invalid 422 * values, and omit the stack trace unless the error level is tuned high. 423 */ 424 void 425 xfs_verifier_error( 426 struct xfs_buf *bp, 427 int error, 428 xfs_failaddr_t failaddr) 429 { 430 return xfs_buf_verifier_error(bp, error, "", xfs_buf_offset(bp, 0), 431 XFS_CORRUPTION_DUMP_LEN, failaddr); 432 } 433 434 /* 435 * Warnings for inode corruption problems. Don't bother with the stack 436 * trace unless the error level is turned up high. 437 */ 438 void 439 xfs_inode_verifier_error( 440 struct xfs_inode *ip, 441 int error, 442 const char *name, 443 const void *buf, 444 size_t bufsz, 445 xfs_failaddr_t failaddr) 446 { 447 struct xfs_mount *mp = ip->i_mount; 448 xfs_failaddr_t fa; 449 int sz; 450 451 fa = failaddr ? failaddr : __return_address; 452 453 xfs_alert(mp, "Metadata %s detected at %pS, inode 0x%llx %s", 454 error == -EFSBADCRC ? "CRC error" : "corruption", 455 fa, ip->i_ino, name); 456 457 xfs_alert(mp, "Unmount and run xfs_repair"); 458 459 if (buf && xfs_error_level >= XFS_ERRLEVEL_LOW) { 460 sz = min_t(size_t, XFS_CORRUPTION_DUMP_LEN, bufsz); 461 xfs_alert(mp, "First %d bytes of corrupted metadata buffer:", 462 sz); 463 xfs_hex_dump(buf, sz); 464 } 465 466 if (xfs_error_level >= XFS_ERRLEVEL_HIGH) 467 xfs_stack_trace(); 468 } 469